JPH07137799A - Automatic oil feeding nozzle - Google Patents

Abstract

PURPOSE:To ensure an accurate opening and closing action of a valve for automatic oil feeding in an oil feeding device which stops the supply of fuel oil to a nozzle by a solenoid valve. CONSTITUTION:In an automatic oil feeding nozzle provided with an automatic valve closing mechanism 50 for detecting the liquid surface in a tank and making a main valve 42 contact with a valve seat 38 and the valve seat 38 which displaces under liquid feeding pressure in the direction disengaging from the main valve 42 or is released from the liquid feeding pressure and displaces in the direction of the main valve 42 by the biasing force of a spring 46 to reengage the main valve 42 with a lever 61, the main valve 42 is provided with through holes 76 and 75 in communication with a nozzle end 32 and a small valve 73 is provided to open the through hole 75 by pulling up the lever 61. While the lever 61 is left as-pulled, a main valve chamber 39 is in communication with the nozzle end 32 to permit the pressure of the main valve chamber 39 to escape into the nozzle end 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic oil supply nozzle suitable for an oil supply device for supplying fuel oil by an oil supply pump common to a plurality of measuring mechanisms.

[0002]

2. Description of the Related Art An automatic fueling nozzle used in a gas station or the like engages a lever releasably with a locking member as disclosed in Japanese Patent Publication No. 3-64398, and
The main valve, which comes into contact with the valve seat by the urging force of the first spring and moves in the direction of retracting from the valve seat by pulling up the lever, and the liquid level in the tank are detected, and the main member and the lever are locked to the locking member. An automatic valve closing mechanism that releases the engagement to bring the main valve into contact with the valve seat, and a displacement of the main valve to the direction in which it receives the liquid supply pressure and disengages from the main valve. A valve seat for pressing and displacing the main valve in the direction of the main valve to reengage the main valve with the lever, and moving the valve seat and the main valve by sending fuel oil from the pump and stopping the liquid supply. It is configured to control the refueling operation and the refueling stop operation. However, in a fuel supply system that receives the delivery of fuel oil by a common pump, it is necessary to continue the supply of fuel oil to other nozzles. Since it is performed by the stop valve in the flow path, the hydraulic pressure in the main valve chamber cannot be released through the pump as in the case of stopping the liquid supply by stopping the pump. It becomes extremely difficult to retract the valve seat and the main valve by the force of the spring generated. In order to solve such a problem, a bypass pipe is provided between the main valve chamber and the nozzle via an electromagnetic valve,
Although it is possible to open and close this solenoid valve in accordance with the automatic valve closing operation by a drive signal, there is a problem that not only the nozzle becomes large, but also the control device becomes complicated.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to operate a main valve or a valve seat at the time of automatic valve closing only by operating a refueling lever. It is an object of the present invention to provide a novel automatic oiling nozzle capable of releasing the hydraulic pressure generated by the nozzle.

[0004]

In order to solve such a problem, according to the present invention, a lever is releasably engaged via a locking member and a valve seat is urged by a biasing force of a first spring. A main valve that moves in a direction of retracting from the valve seat by pulling up the lever, and detects the liquid level in the tank to disengage the main valve and the lever from the locking member. An automatic valve closing mechanism for bringing the main valve into contact with the valve seat, and a displacement of the main valve in the direction of receiving the liquid supply pressure and separating from the main valve, and releasing the liquid supply pressure by the urging force of the second spring. A valve seat for pressing and displacing the main valve in the direction of the main valve to re-engage the main valve with the lever, forming a passage in the main valve body that communicates with the tip of the cylinder, and opening the passage by pulling up the lever. A small valve was installed.

[Function] When the lever is pulled and is in a refueling state, the small valve follows the lever and retracts from the passage of the main valve, so the main valve is in communication with the tip of the cylinder, and liquid supply is stopped. Hydraulic pressure can later be released from this passage, providing a smooth valve seat for reengaging the main valve with the lever.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows an embodiment of a refueling facility to which a refueling nozzle of the present invention is applied. In the figure, reference numerals 1 and 2 respectively denote refueling devices, and a submerged pump 5 through a fuel oil supply pipe 6 It is configured to measure the fuel oil in the underground tank 7 that is pumped under pressure. These refueling devices 1 and 2 are flowmeters 12 and 13 connected to a fuel oil supply pipe 6 via electromagnetic valves 10 and 11, respectively,
It is provided with automatic refueling nozzles 16 and 17, which will be described later, connected via nozzle hoses 14 and 15, control means 18 and 19, and indicators 20 and 21 for displaying refueling data.
The control means 18, 19 open / close the solenoid valves 10, 11 by the signals from the nozzle switches 22, 23, and the flow pulse generator 24 connected to the flow meters 12, 13.
The signals from 25 are counted and displayed as the amount of refueling on the display 20, 2
It is configured to output to 1.

FIGS. 2 and 3 show an embodiment of the above-described automatic fueling nozzle of the present invention. The fueling nozzle main body 31 includes a barrel tip portion 32, a barrel body portion 33, and a grip portion 3.
4, an air passage pipe 35 having one end communicating with an opening 35a provided in the vicinity of the tip of the cylinder tip portion 32 is inserted into the cylinder tip portion 32, and the other end has a passage 6
It is connected to the negative pressure generating chamber 37 of the check valve 36 provided in the barrel portion 33 via 2 and is further opened into the negative pressure chamber 51 of the automatic valve closing mechanism 50 by the flow passage 63.

On the other hand, a main valve chamber 39 is provided in the barrel body 33, and the flowmeters 12 and 1 of the oil supply device connected to the side surfaces are provided.
The flow passage that is connected to the other ends of the hoses 14 and 15 that communicate with 3 and reaches the cylinder tip portion 32 from the main valve chamber 39 is always urged by the spring 41 through the valve rod 43 so as to close the flow passage. A main valve 42 is provided, and the cylinder body 33
As shown in FIG. 3, an automatic valve closing mechanism 50 that closes the main valve 42 by deforming the diaphragm 52 by the negative pressure generated in the negative pressure chamber 51 is provided on the side surface of the.

As is well known, the automatic valve closing mechanism 50 operates as the main valve 42 when the opening 35a located at the tip of the cylinder tip portion 32 of the air flow pipe 35 is closed by the liquid in the fuel tank of the vehicle. The negative pressure chamber 51, which operates to close the flow passage and communicates with the air flow pipe 35 through the flow passage 63, is constantly urged outward (downward in the drawing) by a spring 53 to a diaphragm. 52 is stretched, the diaphragm 52 has a U-shaped piece 54 fixed thereto, and two pins 55 that slide in the long groove of the piece 54 are provided in a part of the valve rod 43. The push rod 56 is located in the notch 34 and is configured to engage with and disengage from the recess 57 of the push rod 56 that is inserted into the valve rod 43. ing.

The push rod 56 is always in contact with its rear surface by a spring 58 acting on its rear end so as to bias the refueling lever 61 forward, and one end thereof is pivotally supported by a pin 64. By pulling the refueling lever 61, the push rod 56 is moved to the right in the figure against the spring 58, and the flow path is opened with the valve rod 43 and the main valve 42 engaged with the push rod 56 via the pin 55. Is configured.

A valve seat 38, which is in contact with the main valve 42 and closes the flow path, is slidably disposed on the upstream side of the check valve 36 in the barrel portion 33. This valve seat 38 has, in addition to its general function, the main valve 42 which is removed from the push rod 56 and abuts against it by the detection of the liquid level, the solenoid valves 10 and 11 thereafter closed, and a small valve described later. The main valve 42 is moved to the right in the drawing due to the decrease in hydraulic pressure due to the opening of the through hole 75 by 73, and again has the function of engaging the push rod 56 with the pin 55 through the pin 55. Is spring 4
The urging force of the spring 46 is strong enough to move the main valve 42 to the right in the figure against the urging force of 1.

Reference numeral 73 in the figure denotes the aforementioned small valve provided in the main valve 42, and as shown in FIG. 4, the operating rod 70 whose one end is always in contact with the oil supply lever 61 by the coil spring 71.
Is provided at the other end and is movably accommodated in the small valve chamber 74. The small valve chamber 74 communicates with the nozzle barrel tip 32 on the tip side of the main valve 42 with the through hole 75, and also communicates with the main valve chamber 74 via the small hole 76. The through hole 75 is provided at a position facing the small valve 73 and is opened by pulling up the lever 61 (FIG. 4B). Reference numeral 78 in the figure denotes a packing member provided on the main valve 42.

FIG. 5 shows an embodiment of the control means 18 and 19 in the above-mentioned oil supply devices 1 and 2. Reference numerals 81 and 91 in the figure denote counting means, and the flow rate pulse transmitter 2 is provided.
The flow rate pulses from Nos. 4 and 25 are counted and converted into the amount of refueling, and the indicators 20, 21 are driven by the indicator driving means 82, 92.
Is displayed as the refueling amount. 83 and 93 are
The refueling stop detection means determines that the refueling operation has stopped when the flow rate pulse input from the flow rate pulse transmitters 24, 25 suddenly decreases, and outputs a signal. 84,
Reference numeral 94 denotes a time counting means, which is activated by a signal from the refueling stop detecting means 83 and 93 and outputs a signal at the time until the bubbles in the automobile fuel tank disappear, for example, at the time of 2 to 3 seconds. is there. Reference numerals 85 and 95 denote solenoid valve drive means, which are nozzle off signals from the nozzle switches 22 and 23,
And the solenoid valve 10 according to signals from the time measuring means 84, 94,
11 is opened, and the solenoid valves 10 and 11 are closed by signals from the fuel supply stop detection means 83 and 93. Reference numeral 87 is a pump control means, and one refueling device 1, 2
The output of the nozzle off signal is detected from the pump 5
In addition, the nozzles of all the oil supply devices 1 and 2 detect that the disconnection signal has disappeared and stop the pump 5.

In this embodiment, refueling nozzles 16, 1
In the state where 7 is set on the nozzle hooks of the oil supply devices 1 and 2, the submerged pump 5 is stopped and the solenoid valves 10 and 11 are also closed. In this state, as shown in FIG. 6 (i), the valve seat 38 slidably assembled in the main valve chamber reaches a position where it abuts on the stopper 65 by the urging force of the strong spring 46 acting on the back surface thereof. It is advancing to the right in the figure. Therefore, the main valve 42, which is urged by the spring 41 and is in contact with the valve seat 38, is also pushed back to the right in the figure, and the pin 55 located in the notch 34 of the valve rod 43 is pushed by the push rod 56 during this time. The valve rod 43 and the push rod 56 are engaged with each other by engaging the concave portion 57 of the. Further, the small valve 73 has the lever 61 in the state shown in FIG.
Is pressed to close the through hole 75 of the main valve 42.

In this state, when one refueling nozzle 16 is removed from the nozzle hook to fill the fuel tank of the automobile with gasoline, the control means 1 is activated by a signal from the nozzle switch 22.
8 resets the display on the display 20 to zero, activates the mergeable pump 5, and opens the solenoid valve 10. For this reason, the valve seat 38 that has occupied the forward position (right side in the figure) biased by the spring 46 receives the hydraulic pressure from the pump 5 and moves backward (left side in the figure) while the main valve 42 is in contact. ) (Fig. 6 (ii)). Even in this state, the small valve 73 closes the through hole 75 of the main valve 42 and prevents the fuel oil from flowing out from the through hole 75, because the other end of the operating rod 70 of the small valve 73 is in contact with the lever 61.

Next, when the cylinder tip portion 32 is inserted into the fuel filler port of the automobile fuel tank and the fuel filler lever 61 is pulled and locked by the latch 88 at that position, the push rod 56 pushed by the lever 61 is pushed through the pin 55. The valve rod 4 which is combined and made into one
3 is pulled back to the right in the figure to open the main valve 42 (Fig. 6 ii
i), the fuel oil sent by the pump 5 and passing through the electromagnetic valve 10 is guided from the negative pressure generating portion 37 of the check valve 36 to the cylinder tip portion 32, and is then supplied into the tank. When refueling is started in this way, negative pressure is generated in the negative pressure generating portion 37 of the check valve 36 by the Venturi effect, but the opening 35a on the cylinder tip side of the air flow path pipe 35 opened here is exposed to the atmosphere. Therefore, the inside of the air flow pipe 35 is maintained at the atmospheric pressure at this point. In this state, since the lever 61 is pulled, the operating rod 70 retracts and the small valve 73 opens the through hole 75 (FIG. 4B).

When the liquid level in the tank rises due to the subsequent refueling, and eventually the opening 35a located at the cylinder tip portion 32 is blocked by the liquid in the tank or bubbles, the negative pressure chamber 51 communicated with the pipe 63. However, the negative pressure is generated by the negative pressure generating portion 37 of the check valve 36, and this negative pressure attracts the diaphragm 52 upward in the figure against the spring 53.
The piece 54 integrated with this is pulled up to remove the pin 55 from the recess 57 of the push rod 56. As a result, the valve rod 43, which is released from the restraint by the pin 55, moves to the left in the figure by the biasing force of the spring 41 together with the pin 55, and brings the main valve 42 into contact with the valve seat 38 to close it. Stop refueling (Fig. 6 iv).

Even in this state, since the small valve 73 is located on the right side in the figure, the main valve chamber 39 communicates with the cylinder tip portion 32 through the through holes 76 and 75, but flows out from here. The amount of fuel oil used is negligible compared to the amount of fuel oil when the main valve 42 is open.

In this state, the refueling stop detection means 83 suddenly decreases the input of the flow rate pulse from the flow rate pulse transmitter 24. Therefore, the refueling stop detection means 83 immediately detects the refueling stop and sets the timing means 84 by a signal. The solenoid valve 10 is closed. By closing the solenoid valve 10, the supply of fuel oil to the nozzle is cut off. On the other hand, even in this state, the refueling lever 61
Is in a state of being pulled by being locked by the latch 88, the main valve chamber 39 communicates with the cylinder tip portion 32 through the through holes 76 and 75, and the hydraulic pressure acting there is applied to the cylinder tip portion 32. Escape to. As a result, the valve seat 38, which is released from the action of hydraulic pressure by closing the solenoid valve 10, pushes the main valve 42 to the right in the drawing by the urging force of the spring 46 and advances it, and engages the pin 55 again at the end thereof. To engage the push rod 56 of the valve rod 43 (v in FIG. 6).

Then, after a predetermined time from this state, that is, 2 to 3 seconds until the bubbles disappear, the solenoid valve drive means 85 causes the solenoid valve 1 to operate in response to a signal from the timing means 84.
0 is released again. As a result, the liquid flowing into the main valve chamber 39 moves the valve seat 38 back to the left in the drawing against the spring 46, separates the main valve 42 from the valve seat 38, and enters the refueling operation again (Fig. 6 iii).

After the refueling is resumed, the air passage pipe 3 is again provided.
When the opening 35a of No. 5 is closed by bubbles, the automatic valve closing mechanism 50 closes the main valve 42 and stops refueling by the above-described process. When such an operation is repeated three or four times, the solenoid valve drive means 85 regards the vehicle fuel tank as full and keeps the solenoid valve 10 closed without outputting a signal thereafter.

When the lever 61 is disengaged from the latch 88, the lever 61 pushes the operating rod 70 leftward in the figure, so that the through hole 75 of the main valve 42 is closed by the small valve 74 and the fuel oil flows out. Are blocked (Fig. 6i). When the nozzle 16 is returned to the nozzle hook, and the nozzle 17 of the other oil supply device 2 is removed and the oil supply operation is being performed, the pump control means 87 operates the pump 5 as it is, and the other nozzle 17 Is set on the nozzle hook, the pump 5 is stopped.

In this embodiment, the pump is housed in the oil storage tank, and the fuel oil supply pipe is used to supply the pump to the plurality of oil supply devices. However, as shown in FIG. A common pump 102 is accommodated, and a plurality of flow meters 12, 1 are provided by a branch pipe 103.
It is obvious that the same effect can be obtained by using the nozzles 16 and 17 for automatic oil supply in the multi-nozzle type oil supply device 104 that supplies the fuel oil to No. 3 as well.
Further, in the above-described embodiment, the case where the common pump is used to feed the liquid to the plurality of oil supply mechanisms has been described as an example.
It is obvious that the same effect can be obtained even when applied to an oil supply device of a type in which one pump is connected to one oil supply nozzle.

[0023]

As described above, according to the present invention, the lever is releasably engaged via the locking member, and is brought into contact with the valve seat by the urging force of the first spring. A main valve that moves backward from the valve seat when pulled up, and an automatic valve closing that detects the liquid level in the tank and disengages the main valve and lever from the locking member to bring the main valve into contact with the valve seat. The mechanism is displaced in the direction of receiving the liquid supply pressure in the direction of separating from the main valve, and the liquid supply pressure is released and pressed by the urging force of the second spring in the direction of the main valve to reengage the main valve with the lever. In a fueling nozzle having a valve seat for mating, a passage communicating with the cylinder tip of the nozzle is formed in the main valve body, and a small valve that opens by pulling up the lever is provided in this passage, so the lever is pulled. In the state, when the main valve chamber and the tip of the cylinder are in communication with a small flow path, the valve is closed automatically. The movement of the valve seat for to discharge the hydraulic pressure in the main valve chamber tube end portion side recombining main valve to the lever can be reliably performed.

[Brief description of drawings]

FIG. 1 shows an embodiment of an oil supply facility to which an automatic oil supply nozzle of the present invention is applied.

FIG. 2 is a sectional view showing an embodiment of an automatic oil supply nozzle of the present invention.

FIG. 3 is a top view showing an embodiment of the automatic oil supply nozzle of the present invention.

4 (a) and (b) show the structure of the small valve,
It is a figure which shows a non-fueling state and a lubrication operation state.

FIG. 5 is a block diagram showing an embodiment of a control device of the same device.

6 (i) to (v) are explanatory views showing the operation of the above-mentioned apparatus.

FIG. 7 is a diagram showing another application example of the present invention.

[Explanation of Codes] 1, 2 Oil supply device 5 Pump 10, 11 Electromagnetic valve 12, 13 Flow meter 16, 17 Oil supply nozzle 24, 25 Flow rate pulse transmitter 32 Tube tip part 36 Check valve 37 Valve seat 42 Main valve 50 Automatic valve closing Mechanism 73 Small valve 75, 76 Through hole

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[Procedure amendment]

[Submission date] May 17, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (2)

[Claims] 1. A direction in which a lever is releasably engaged via a locking member, abuts against a valve seat by an urging force of a first spring, and retracts from the valve seat by pulling up the lever. A moving main valve, an automatic valve closing mechanism that detects the liquid level in the tank and releases the engagement of the main valve and the lever with the locking member to bring the main valve into contact with the valve seat, It receives hydraulic pressure and displaces in the direction away from the main valve, and the liquid supply pressure is released, and it is pressed and displaced in the direction of the main valve by the urging force of the second spring, causing the main valve to move back to the lever. An automatic fueling nozzle comprising the valve seat to be engaged with the main valve main body, and a small valve that forms a passage communicating with a cylinder tip portion and opens the passage by pulling up a lever. 2. The automatic fueling nozzle according to claim 1, wherein the small valve is constantly urged by a spring in a direction to open the passage.